( 4-33 ) 



Sexes alike, 011I3' the nudes slightly larger than the fe nudes. Males : wing, 167, 

 167, 168, 169; tail, 350—360 mm. Females: wing, 160, 164; tail, 345, 355 mm. 



This form of long-tailed Cuckoo diflfers considerably from Rh. elongatus of Sumatra. 

 The rugo.se strawberry-red bare jiatch on the sides of the head is more extended in front 

 of and behind the eye, reaching along to the base of the bill and thus doing away with 

 the black loral ijatch oi B. elonijafus. The black line above the nostrils is indistinct, 

 the surroundings of the eye, sides of the head and throat are much lighter, quite 

 whitish. The no.stril is perhaps more round, being perfectly circular, but all elongatus 

 before me have a string through tlie nostrils. The bill is larger, the wing slightly 

 longer. It is probably a misprint of Dr. Vorderman that Rh. elongatus is larger ! 



Ehopoclytes trlstis of India, ]\Ialacca, etc., 



Rhopodytes elongatus of Sumatra, 



Rhopodytes borneensis of Borneo, and 



Rhopodytes kaiujeangensis from Kangean are so closely allied, that they are 

 probably best treated as subspecies of Rh. tristis. The latter two are, however, more 

 different than the former two, which are very clcsely allied. 



The occurrence of this bird, with its nearest ally evidently on Sumatra, while the 

 genus is altogetlier absent from Java, is most interesting. 



The local name is " lontrok." 



52. Centropus sinensis bubutus Horsf. 



\_Poh,plulux .■<i,ieiisi>: Steph., Gen. Z„oI. IX (ISl.'i) p. 51 (said to inhabit China).] 

 Ceiilropiis Buhiitiis Horsf., Trans. Linn. Sor. XIII (1821) p. 18U (Java). 

 Centrnpus sinensis Vorderm., Nut. Tijdschi-. Ned. fndie LII (1893) p. 189. 



Kangean N., E., W. Three adults and two immature females. These birds 

 agi-ee fully with the Java-form of Centropms sinensis, though the tails seem even 

 rather short for C. s. bubutus, which has a shorter tail than continental C. sinensis. 

 This species has doubtless reached Kangeau from Java, while the following species, 

 which is almost identical in dimensions, but differs totally in colour, must have come 

 from another direction. "Iris roth, Fiisse und Schnabel schwarz." (Nos. 14, 21, 86, 

 182, 233.) 



The local name is " dudut," evidently from the cry, like " bubut " on Java. 



53. Centropus kangeangensis A'orderm. 



Centropus l^iinr/ediiijiiisis Vorderm., Nut. Tijdsc/ir. Ned. hid. LII (1893) p. 190 (Kangean). 



Head, neck, and upper portion of back smoke-grey to creamy-buS', entire under- 

 side, including the sides, flanks, under wing- and under tail-coverts, of the same 

 colom', but generally lighter. Entire wings with up})er wing-co\erts, scapulars and a 

 band across the back light chestnut, the quills deep brown at the tips. Kump like 

 the neck, upper tail-coverts also of the same colour, but in most specimens distinctly 

 barred with narrow whitish cross-lines. Tail smoke-grey to greyish-buff. '• Iris red, 

 bill and feet black. Wing : ? 210, i 203. S 201, S 196 mm. ; tail : ? 271, S 260, 

 S 252, c? about 255 mm. (worn and moulting). 



Kangean, N.W.. S.E., N.E. (Nos. 45, 91, 108, 122, 229.) 



This bird is in many respects a most remarkable one. We do not think that 

 Dr. ^'orderman's statement that Centrop^is kangeangensis "is zeer na verwant aan 

 C. cdebensis," and that it is undoubtedly a Celebesjan form, is quite correct. In its 



